SOLUTION: A mathematics student has scores of 74, 78, and 70 on three examinations. What score is needed on the fourth exam for the student to earn an average grade of 80?

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Question 963757: A mathematics student has scores of 74, 78, and 70 on three examinations. What score is needed on the fourth exam for the student to earn an average grade of 80?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
%2874%2B78%2B70%2BT%29%2F4=80
222%2BT=320
Solve for T.